1390218424 has 32 divisors (see below), whose sum is σ = 3019857120. Its totient is φ = 587644416.

The previous prime is 1390218421. The next prime is 1390218433. The reversal of 1390218424 is 4248120931.

It is a self number, because there is not a number n which added to its sum of digits gives 1390218424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390218421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165949 + ... + 174124.

It is an arithmetic number, because the mean of its divisors is an integer number (94370535).

Almost surely, 2^1390218424 is an apocalyptic number.

1390218424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1390218424 is an abundant number, since it is smaller than the sum of its proper divisors (1629638696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1390218424 is a wasteful number, since it uses less digits than its factorization.

1390218424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340159 (or 340155 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1390218424 is about 37285.6329435347. The cubic root of 1390218424 is about 1116.0774837754.

The spelling of 1390218424 in words is "one billion, three hundred ninety million, two hundred eighteen thousand, four hundred twenty-four".